Apparatus and method of marbling paper



June 2, 1931.

F. G. CRANE ET AL APPARATUS AND METHOD OF MARBLING PAPER Filed July 3, 1929 2 Sheets-Sheet 1 Fra /f 6. aka/n A TTORNE Y$ June 2, 1931. F. G. CRANE ET AL 1,808,021

APPARATUS AND METHOD OF MARBLING PAPER Filed July 5. 1929 2 Sheets-Sheet 2 INVENTOR 4 Fwy/r 6. fizz/7K BY Jose /2 WWO -6% W E Q TTO NEY$ Patented June 2, T1931 FRANK G. CRANE AND JOSEPH IYI. WARD, 9F DETROIT, MICHIGAN APPARATUS AND METHOD MARBLING PAPER Application filed July 3, 1929. Serial No. 375,818.

The main objects of this invention are:

First, to provide an apparatus for the coloring of paper by means of which paper may be produced having clouded or mottled effects which is very attractive, both sides of the paper being colored.

Second, to provide an apparatus for securing this result which may be easily embodied in a standard type Fourdrinier paper making machine.

Third, to provide a method of coloring paper during the process of manufacture which enables very accurate control and results in a highly attractive product.

Objects pertaining to details and economies of our invention will definitely appear from the description to follow. The invention is defined in the claims.

A structure which embodies the features of our invention is clearly illustrated in the accompanying drawings. The manner of carrying out the method is also illustrated.

Fig. 1 is a fragmentary plan view of a paper making machine embodying our improvements, the parts being shown mainly in conventional form.

Fig. 2 is a detail view mainly in longitudinal section on a line corresponding to line 2 2 of Fig. 1.

Fig. 3 is a fragmentary plan view showing details of one of the color distributing units. 7

Fig. 4. is a detail section on line 14: of Fig. 3.

Fig. 5 is a detail view on line 5-5 of Fig. 1.

Fig. 6 is a fragmentary perspective View showing a modified form of the brushing mechanism.

departs from direct longitudinal flow on to the web. The result is that the operator can secure a very uniform distribution. A web of paper or paper stock is indicated at 7.

Above and transversely of the forming web we mount a plurality of color troughs 8, each trough being provided with a distributing roller 9 having a spiral-groove 10 forming flat-faced spiral ribs or raised portions 11. The distributing blades 12 are arranged with their rear edges in operative relation to these feed rolls, that is, they are so arranged that they pick up the colored liquid from the raised surfaces of the rolls. The blades are serrated on their outer edges providing a plurality of pointed or A-shaped teeth 13.

These distributing blades are mounted on rods 14 reciprocatingly supported in bearings 15. The shafts 16 for the feed rollers are provided with cams 17 coacting with the rollers 18 on the arms 19 on the rods 14 so that as the feed rollers are rotated these blades are reciprocated, with the result that the liquid which commonly falls from the tips of the teeth is irregularly distributed to the pulp passing beneath.

The spiral raised portion of the feed rollers causes further variations in the distribution and, while the result is a general irregularity in the matter of distribution, this is of I such character that the entire run has a uniform appearance; that is, it possesses the same general characteristics.

At least one of these color applying units is preferably arranged so that the color is dripped upon the stock while it is still under the influence of the flow gates.

The color is applied substantially in ad- Vance of the suction box and with theresult that in the finished product the color appears on both sides of the paper, and it is quite impossible by inspection to determine to which side the color is applied.

When it is desired to secure a general striped efl ect as well as a mottled or marbled effect, we provide brushes 20 which are in the form of flexible straps, preferably formed by slotting a sheet 21 of oilcloth or other suitable fabric.

In the embodiment shown in Figs. 1, 2 and 5 one edge of the sheet is mounted on a rock shaft 22 which is provided with arms 23 having a cross bar 2% thereon, the other edge of the sheet being mounted on this cross bar so that the strap portions 20 hang in loops above the forming wire and, by adjusting the rockshaft, may be brought into or out of engagement with the surface of the pulp.

The bearings for the rockshaft are split and provided with a clamping screw 25 whereby the rockshaft is held in its adjusted position. By thus forming and supporting the brushes they do not materially disturb the fiber. lVhile they do serve to produce a general striped effect in colors, the length of the partof the brush resting upon thepaper web determines largely the distinctiveness of the stripe.

In Fig. 6 we show a modification in which the sheet 26 is mounted upon a rockshaft 27, the edge of the sheet being slotted to provide the brushes 28. The form shown in Fig. 5, however, is preferred in that the brushes may be more easily and accurately adjusted.

Our improved coloring apparatus is, as stated, easily applied to standard types of paper making machines and results in a very desirable product.

WVe have not attempted to illustrate various modifications and adaptations which we contemplate as it is believed that this'disclosure will enable those skilled in the art to embody or adapt the same as may be desired.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

1. The combination with the forming wire and suction box of a paper making machine, of a plurality of color troughs disposed above and transversely of said forming wire in advance of said suction box, feed rolls grooved to provide spiral fiat-faced raised portions mounted to rotate in said troughs, distribut-- ing bladesmounted for longitudinal reciprocation with their inner edges in coacting relation to said feed rolls, said blades having serrated front edges providing a plurality of A-shaped pointed. teeth, and means for driving said rolls and reciprocating said blades.

2. The combination with the forming wire and suction box of a paper making machine, of a plurality of color troughs disposed above and transversely of said forming wire in advance of said suction box, feed rolls having raised surface portions mounted to rotate in said troughs, toothed distributing blades mounted for longitudinal reciprocation with their inner edges in coacting relation to said feed rolls, and means for driving said rolls and reciprocating said blades.

3. The combination with the forming wire of a paper makinrr machine, of a. plurality of color troughs isposed above and transversely of said forming wire, feed rolls having raised surface portions mounted to rotate in said troughs, and toothed distributing blades disposed with their inner edges in 00- acting relation to said feed rolls.

4. The combination with the forming wire of a paper making machine, of a color trough disposed above and transversely of said forming wire, a feed roll having a spirally ribbed surface mounted to rotate insaid trough, a distributing blade mounted for longitudinal reciprocation with its inner edge in coacting relation to said feed roll and having a serrated front edge providing a plurality of pointed teeth, and means for driving said roll and reciprocating said blade.

5. The, combination with the forming Wire of a paper making machine, of a color trough, a feed roll mounted to rot-ate in said trough, a distributing blade mounted for longitudinal reciprocation with its inner edge in coacting relation to said feed roll and having teeth on its front edge, and means for driving said roll and reciprocating said blade.

' 6. The combination with the forming wire and suction box of a paper making machine, of a color trough disposed above and transversely of said forming wire in advance of said suction box, a feed roll having a spirally ribbed surface mounted to rotate in said trough, and a distributing blade disposed with its inner edge in coacting relation to said feed roll and having a serrated front edge providing a plurality of pointed teeth.

7. The combination with the forming wire of a paper making machine, of a color trough, a feed roll having a raised surface portion mounted to rotate in said trough, and a distributing blade disposed with its inner edge in coacting relation to said feed roll and having teeth on its front edge.

8. The combination with the forming wire of a paper making machine, of a color trough, a feed roll having a raised surface portion mounted to rotate in said trough, and a distributing blade disposed with its inner edge in coacting relation to said feed roll.

9. The combination with the forming wire and suction box of a paper making machine, of a color trough disposed in advance of said suction box, a feed roll, and a distributingblade mounted for longitudinal reci rocation with its inner edge in coacting re ation t3 said feed roll and having teeth on its front e go.

10. The combination with the forming wire of a paper making machine, of a color trough, a feed roll, and a distributing blade mountaecaoar a?) cation with itsinner edge in coacting relation to said feed roll, said distributing blade having pointed teeth on'its outer edge, means for rotating said feed roll andreciprocating said blade, and a plurality of flexible strap-like brushes mounted above said forming wire to engage the surface of the web of paper on ghe forming wire in advance of the suction 12. The combination with the forming wire and suction box of a paper making machine, of means for applying colored solution to the weboi paper upon the forming wire in advance of the suction box, a rockshaft provided with arms, and a piece of fabric slotted to provide strap-like brushes mounted at one edge on said rockshaft and at the other edge on said arms whereby the brushes are supported in a loop and may be raised and lowered into contacting engagement with the surface of the web of paper on the forming wire.

13. The combination with the forming wire and suction box of a paper making machine, or" means for dropping liquid color upon the web 01"". paper onthe forming wire in advance of the suction box, and strap-like flexible brushes engaging the surface of the web of paper between the point of application of the coloring solution thereto and the suction box.

14. The combination with the forming wire and suction box of a paper making machine, of a stock feed means adapted to control the direction of flow of the stock upon the forming wire, means for dropping coloring material upon the stock at a point where it is still influenced by said stock feed means and sub stantially in advance of said suction box, a plurality of flexible, strap-like brushes disposed in a series transversely of the forming wire and adapted to engage the surface of the stock upon the wire, and meansfor supporting said brushes whereby their engagement with the stock may be controlled.

- 15. The combination with the forming wire and suction box of the paper making machine, of a stock feed means adapted to control the direction of flow of the stock upon the forming wire, means for dropping coloring material upon the stock at a point where it is still influenced by the said stock feed means and substantially in advance of said suction box, and a plurality of flexible weblike brushes disposed in a series transversely of the forming wire and adapted to engage the surface of the stock upon the wire.

16. The combination with the forming wire and suction box of a paper making machine, of a stock feed means adapted to control the direction of flow of the stock upon the forming wire, and means for dropping coloring material upon the stock at a point where itis still influenced by the said stock feed means and substantially in advance of said suction '17. The combination with the forming wire coloring solution upon the stock while still influenced by said currents, and subjecting to the action of a suction box.

19. The method of making colored paper consisting of controlling the discharge of the pulp upon the forming wire of a paper male ing machine in crossing currents, and dropping coloring solution upon the stock while still influenced by said current-s.

' 1, 20. The method of making colored paper consisting of discharging the stock upon a formmg wire, dropping coloring solution upon the stock on the forming wire and prior to the final positioning thereof in the web by means movable transversely of the web, and subjecting to the action of a suction box.

21. The method of making colored paper consisting of discharging the stock upon a forming wire, and dropping coloring solution upon the stock on the forming wire and prior to the final positioning thereof in the web by means movable transversely of the web.

22. The method of making colored paper consisting of discharging the stock upon a forming wire, dropping coloring solution upon the stock on the forming wire and prior to the final positioning thereof in the web, and subjecting to the action of a suction box.

In witness whereof we have hereunto set our hands.

. FRANK G. CRANE, JOSEPH M. WARD. 

